Soma Fabrications Double Cross Yokozuna Brakes: Read the Fork’s 180mm Note
Soma Fabrications Double Cross Yokozuna brakes need a particular check when paired with the updated unicrown fork. SOMA lists that fork as native for a 160 mm rotor, yet adds a specific note that its pairing with Yokozuna flat-mount brakes requires a 180 mm rotor. Reading only the headline fork specification misses the interaction.
Find the Soma Fabrications Double Cross Yokozuna brakes note
The fork listing identifies it as the updated fork for the 2024 Double Cross frame. Its main specifications say flat mount for 160 mm rotors, not 140 mm. At the end, SOMA explains that the fork and Yokozuna flat-mount brakes are both native for 160 mm, and states the resulting pairing requires a 180 mm rotor.
Treat that as guidance for the named fork and brake combination. It is a reason to identify the caliper before ordering a front rotor, rather than assuming the native-fork number automatically describes the assembled system.
Keep the frame and fork records separate
The matching Double Cross frame has a different rear-brake baseline: SOMA lists native 140 mm, with an adapter for 160 mm. A build therefore contains two mounting locations with distinct specifications. Copying the rear adapter choice onto the front fork does not resolve the Yokozuna note.
Give the workshop the exact fork and caliper model, the intended rotor and the applicable brake instructions. Ask it to confirm the complete front assembly. A rotor diameter alone cannot identify the correct mounting pieces or establish that another caliper follows the same rule.
Check an existing or used build by its parts
Double Cross bicycles span different generations. The historical cantilever-brake bicycle pictured here establishes neither this fork’s identity nor its disc-brake arrangement. On a used bike, identify the installed fork independently of the frame decals and keep photographs of the brake mounting area.
If the bicycle already has a disc brake fitted, have a mechanic establish which parts are present before ordering replacements. The manufacturer’s short note helps explain why a seemingly reasonable 160 mm choice can be wrong for this pairing. It supplies a specific compatibility question, rather than a complete brake-installation procedure.
FAQ
Is the updated fork native for a 140 mm rotor?
No. SOMA specifies native 160 mm for this fork.
What does SOMA state for the Yokozuna pairing?
Its fork listing says Yokozuna flat-mount brakes on this fork require a 180 mm rotor.
Does the rear frame use the same baseline?
No. SOMA lists the corresponding frame as native 140 mm, with an adapter for 160 mm.
Bring the named fork and caliper together to the brake-fitting appointment. The SOMA Fabrications collection covers other build decisions, while our Double Cross and Wolverine introduction supplies family context.
Primary references: official reference 1 (https://www.somafab.com/shop/soma-fork-unicrown-disc-for-double-cross-matte-blk-6937); official reference 2 (https://www.somafab.com/shop/soma-frame-double-cross-matte-blk-6936).
Photograph credits and permissions
Photograph 1
Original title: Touring bicycle (file: Touring bicycle.JPG)
Creator: Keithonearth; creator URI: https://commons.wikimedia.org/wiki/User:Keithonearth
Original source URI: https://commons.wikimedia.org/wiki/File:Touring_bicycle.JPG
License / permission: CC BY-SA 3.0
License / permission URI: https://creativecommons.org/licenses/by-sa/3.0/
Modification notice: Original JPEG bytes unchanged.